Public policy among economists has historically, until recently, focussed on the fact that consumers are made worse off a if there's less competition in an industry. Monopoly literally means one seller, a single seller. If you're the only seller, ah, you have some control over price. You don't take prices given you, in order to sell at higher price,. ou're going to produce less than you otherwise would.
Are tech giants such as Google, Amazon, or Facebook dangerous? Do they have too much power? Dive into the murky waters of antitrust as Michael Munger of Duke University talks with EconTalk host Russ Roberts about monopoly, antitrust policy, and competition in the 21st century.